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Texture atlas mipmapping

Discussion in 'General Graphics' started by Megolas, Mar 17, 2015.

  1. Megolas

    Megolas

    Joined:
    Apr 6, 2013
    Posts:
    25
    I'm currently working on a voxel terrain, but I'm encountering issues when trying to use a texture atlas on each block: http://imgur.com/a/5T7tI (Red used to make the effect appear better)
    I get seams from nearby textures on each block. I've tried turning off mipmapping and adding 1 pixel padding, but both just lessen the effect, and not remove it. Is there a way to mipmap each tile, or any other way to fix this?
     
    Megolas, Mar 17, 2015
    #1

  2. larsbertram1

    larsbertram1

    Joined:
    Oct 7, 2008
    Posts:
    6,848
    you need wider borders (16-32px).
    and you have to use tex2Dlod instead of tex2D while calculating the needed mip level by yourself.
     
    larsbertram1, Mar 17, 2015
    #2

  3. Megolas

    Megolas

    Joined:
    Apr 6, 2013
    Posts:
    25
    Doesn't tex2Dlod only work in opengl? Isn't there a way to do this on all platforms without adding padding (Usage of said atlas?)
     
    Megolas, Mar 17, 2015
    #3

  4. Megolas

    Megolas

    Joined:
    Apr 6, 2013
    Posts:
    25
    Bump.
     
    Megolas, Mar 18, 2015
    #4

  5. larsbertram1

    larsbertram1

    Joined:
    Oct 7, 2008
    Posts:
    6,848
    no
    no
     
    larsbertram1, Apr 3, 2015
    #5